1-778-759-9864
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BCFurnace
LENNOX PRESSURE SWITCH 0.33" WC Air Pressure Switch, Air Proving furnace part available in Vancouver, Burnaby, Port Moody, Langley, North Vancouver, Richmond, Maple Ridge, Delta, West Vancouver, New Westminster, Surrey, Coquitlam, Port Coquitlam, Pitt Meadows

LENNOX PRESSURE SWITCH 0.33" WC Air Pressure Switch, Air Proving

BCFURNACE

773-339

CA$84.68

+5% Tax • Shipping calculated at checkout.

U.S. Duties/Taxes, if applicable, may be due at time of delivery.

Name

LENNOX PRESSURE SWITCH 0.33" WC

1units available

Pickup available at 75 Blue Mountain St #3

Usually ready in 24 hours

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Fast Delivery
Local Pickup

Not sure this fits your furnace? Call us — we're happy to help

Product Details

Description

This premium air pressure switch is a vital safety component designed for heating systems, specifically engineered to monitor airflow and ensure safe furnace operation. Calibrated to a precise 0.33" WC set point, this air proving switch detects whether the draft inducer motor is creating sufficient vacuum to safely exhaust flue gases. If the pressure falls outside the safe range due to a blocked vent or mechanical failure, the switch prevents the ignition cycle, protecting the system from overheating or gas buildup. This high-performance pressure switch is an essential replacement part for restoring the reliability of residential HVAC units and gas furnaces, helping to troubleshoot common ignition failures and intermittent heating issues.

Specifications

Type
Air Pressure Switch
Size
Small
Application
Used in residential gas furnaces and HVAC heating systems to monitor draft inducer pressure and ensure proper venting before ignition.
Specifications
Pressure Setting: 0.33" WC (Water Column); Function: Air Proving and Safety Interlock; Component Type: Single Stage Air Pressure Sensing

Not sure this is the right part?

Our team is happy to help you verify compatibility before you order. We'll confirm it fits your specific furnace model.

1-778-759-9864

Mon–Sat 8AM–9PM PST · Or email parts@bcfurnace.com

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Frequently Asked Questions

Is the 773-339 a genuine OEM part?
Yes, the 773-339 is a genuine OEM replacement part manufactured by BCFurnace. We source all Air Pressure Switches from authorized distributors to ensure exact-fit compatibility. This Air Pressure Switches is backed by our 100% compatibility guarantee — if it doesn't fit your furnace, we'll make it right.
How do I know if the 773-339 is compatible with my BCFurnace furnace?
The easiest way is to match the part number (773-339) with your furnace model number. Visit the BCFurnace page on our site and enter your model number in the search bar — our system will show all compatible Air Pressure Switches for your specific unit. You can also call our technicians at 1-778-759-9864 for free compatibility verification.
How fast can I get the 773-339 shipped?
Most Air Pressure Switches including the 773-339 ship within 1–2 business days from our warehouse. We ship across Canada and the United States with tracking on every order. For urgent BCFurnace repairs, contact us at 1-778-759-9864 for expedited shipping options.
Can I pick up the 773-339 at your store?
Yes! Local pickup is available at our Coquitlam, BC location: 75 Blue Mountain St #3. Air Pressure Switches orders are usually ready within 24 hours. Call us at 1-778-759-9864 to confirm the 773-339 is in stock before visiting.

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